fix(completion): fix issues with completion escaping

[reubeno]

No description provided.

[github-actions]

Test Results

    3 files     32 suites   15m 22s ⏱️
1 888 tests 1 888 ✅ 0 💤 0 ❌
5 636 runs  5 636 ✅ 0 💤 0 ❌

Results for commit 95cbfb2.

[github-actions]

Public API changes for crate: brush-core

Added items

+pub brush_core::completion::ProcessingOptions::quote_char: core::option::Option<char>

Performance Benchmark Report

Benchmark name	Baseline (μs)	Test/PR (μs)	Delta (μs)	Delta %
clone_shell_object	17.88 μs	17.61 μs	-0.27 μs	🟢 -1.49%
eval_arithmetic	0.13 μs	0.13 μs	0.00 μs	⚪ Unchanged
expand_one_string	1.56 μs	1.58 μs	0.02 μs	⚪ Unchanged
for_loop	21.52 μs	21.60 μs	0.09 μs	⚪ Unchanged
function_call	2.22 μs	2.19 μs	-0.03 μs	⚪ Unchanged
instantiate_shell	51.98 μs	53.12 μs	1.14 μs	⚪ Unchanged
instantiate_shell_with_init_scripts	21932.14 μs	21972.93 μs	40.79 μs	⚪ Unchanged
parse_bash_completion	2190.70 μs	2186.99 μs	-3.71 μs	⚪ Unchanged
parse_sample_script	1.88 μs	1.88 μs	-0.00 μs	⚪ Unchanged
run_echo_builtin_command	11.41 μs	11.37 μs	-0.05 μs	⚪ Unchanged
tokenize_sample_script	3.49 μs	3.47 μs	-0.02 μs	⚪ Unchanged

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
brush-builtins/src/bind.rs	🟢 84.41%	🟢 78.91%	🔴 -5.5%
brush-core/src/completion.rs	🟠 69.97%	🟠 70.05%	🟢 0.08%
brush-core/src/results.rs	🟢 83.33%	🟢 80.16%	🔴 -3.17%
brush-interactive/src/basic/term_line_reader.rs	🔴 38.74%	🔴 38.14%	🔴 -0.6%
Overall Coverage	🟢 74.84%	🟢 74.73%	🔴 -0.11%

Minimum allowed coverage is 70%, this run produced 74.73%

Test Summary: bash-completion test suite

Outcome	Count	Percentage
✅ Pass	1536	72.83
❗️ Error	17	0.81
❌ Fail	202	9.58
⏩ Skip	339	16.07
❎ Expected Fail	13	0.62
✔️ Unexpected Pass	2	0.09
📊 Total	2109	100.00